fwrite writing from beginning without removing

php fwrite
umuur picture umuur · Jul 13, 2011 · Viewed 9.3k times · Source

I am using PHP and fwrite code, but I want every write position to start from the beginning of the file without erasing it's content. I am using this code but it is writing to the end of the file.

$fr = fopen("aaaa.txt", "a");
fwrite($fr, "text");
fclose($fr);

Answer

Wiseguy picture Wiseguy · Jul 13, 2011

So you want to write at the beginning of a file, leaving all of its current contents after the new data? You'll have to grab its existing contents first, then append it back into the file once you've overwritten with your new data.

$file = 'aaaa.txt';
$oldContents = file_get_contents($file);
$fr = fopen($file, 'w');
fwrite($fr, "text");
fwrite($fr, $oldContents);
fclose($fr);

If you want to avoid loading the original file's contents into memory in your PHP script, you might try first writing to a temp file, using a loop buffer or system calls to append the contents of your original file to the temp file, then remove the original file and rename your temp file.

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